Self-contained latching mechanism for intermittent-thread-cutting temples



Jan. 31, 1928. 1,658,012

' G. H. WILLARD SELF CONTAINEDLATCHING MECHANISM FOR INTERMITTENT THREADCUTTING TEMPLES Filed Nov. 5. 1926 lnvenrolf. George H. WI Hard PatentedJan. 31, 1928.

UNITED STATES, PATENTQFFICL,

enonen 1-1:. WILLARD, or 'IHOPIEDALE,MASSACHUSETTS, nssreuon T ."onarnnconronn'rron, or nornnatn, MASSACHUSETTS, A CORPORATION or MAINE.

SELF-CONTAINED LATGI-IING- MECHANISM FOR INIERMIT'IENT-THREAID-CUTTINGTEMELES.

Application filed November 5, 1926. Senial No; 146,391.?

This invention relates to a thread cutting temple of the intermittentlyacting type such as employed in looms provided with automatic fillingreplenishing mechanism and 1n which the'thread cutting mcchanisi'n isheld in inoperative position by a detent latch element during the normaloperation of the loom, but is rendered operative at the time offillingreplenishment so as to sever the 0 filling ends left at the selvage asthe result of such replenishment;

One form of such an intermittent thread cutting temple is disclosed inthe patent to Stimpson, No. 1,552,016, September 1, 1925.

. Therein the prime actuating element for effecting the movement of thedetent latch to render the cutting mechanism operative is the usualshuttle feeler which moves when filling replenishment is to take placeand the ac movement of this shuttle feeler acting through certaincontrolling nechanisi'n deescribed in the said patent and located re--mote from the temple is transmitted through a Bowdcn wire to the detentlatch. The

trated is disclosed in connection with such a constructlon. But theinvention in 1ts broader aspects is not restricted to this particulartype of mechanism because various means may be employed to effect themove ment of the latching mechanism at the de-. sired time as, forexample, when filling re-,

plenish-mentj takes place.

Theobject of; the present invention is prii'narily to provide aself-contained latching mechanism-which may readily be bodily attachedorsecured to-a standard thread cut ting temple. The invention thusrenders t a: comparatively s mple matter to equip (iXlStio ing loomsprovided withthreadcutting temples with the mechanism necessary tosecure intermittent action of the thread cutting.

mechanism.

The object of the invention is further to present invention in thespecific form il'lus v As the general construction and operation ofvarlous types of lntermit-tent thread cutting. templesrfor looms arewellknown'and familiar to those-skilled in the art and as the patent toStimpson above referred to discloses in full detail one formiof suchmechanism, and as the present invention is not concerned with theparticular mechanism employed for effecting the movement of the latchingmechanism, it will only be necessary here to illustrate and describe asimple and preferred form of construction embodying the invention whenused in connection with the mechanismdisclosed in the said Stimpsonpatentl In the drawings:

Fig.1 is aside elevation of an intermittent thread cutting temple with apreferred form of the presentinvention mounted thereon.

l ig. Qis a View in perspective of the base elementof the self-containedlatching mechanism shown in Fig. 1.

Fig. is a top plan view of the construction shown in Fig. 1.

' Fig. i is a view in transverse cross section taken on the line 4- 1 ofFig. 3.

The thread cutting temple illustrated is of a well known and familiartype. The temple stand is an elongated box-like structure comprisingbottom and top members. The bottom member has a flat bed plate 1 and avertical wall 2. The .top member has a vertical wall v3 opposed .to. thewallf2, a top plate t extending above .th e bed plate 1, and a'flange 5resting on the bed plate. 1 and secured thereto by screws 6.. :Anelongated slot 7 form-ed inthe flange- 5 and bed plate 1 pro- .vidcs apassageway. forthe usual bolts by which the temple.standis'seeured tothe breastbeamofthe loom. The temple head 8 is carried byor formedintegrally with the temple shank 9 which is mounted to slidelongitudinally a. the stand. The temple head and shank are projectedrearwardly by a usual spring .10'surrounding the shank in the stand andforwardly by engagement of the layof'thefloom with the usual heel 11depending from the, temple head.

The cutting mechanism illustrated comprises a fixed cutter blade 12mounted at the front of the temple head and a movable cutter blade 13mounted to rock and reciprocate in the temple head and cooperate withthe fixed blade. This movable cutter member is or retracted position.

provided with the usual depending heel 14. which, when struck by thelay, effects the cutting movement while the usual spring connected atits upper end to the shank 9 and at its lower end to a stud 16projecting laterally from the heel 14 effects the movement of themovablecutter member to its forward projected position.

The present invention is not concerned with any specific form of threadcutting temple and the construction just described is employed simplyfor illustration.

In the intermittent type of thread cuttingtemple the thread cuttingmechanism is normally held inoperative and in the constructionillustrated this is secured by providing the movable thread cuttingmember 13 with a laterally extending stud or projection 17 which isengaged by a detent latch when the movable cutter member is in itsinoperative The present invention has to do with the latching mechanismwhich, when in latching position, renders the cutting mechanisminoperative and, when in unlatching position, renders the cuttingmechanism operative. In the construction illustrated, the movement oithe latching mechanism to theiormer position is e'liected by a spring 18and to the latter position is 30' effected by an actuator transmitter inthe term of a Bowden wire 19. But the invention broadly considered isindependent of the particular instrumentalities for effecting thesemovements. In the construction illustrated, the Bowden wire 19 may beactuated, by such a construction as disclosed in the Stimpson patentreferred to, upon the call for filling replenishment.

The feature of the present invention is that the entire latchingmechanism is embodied in "a self-contained structure which may bereadily attached to a standard form of temple. Thus existing looms inuse in mills and already havingthread cutting temples may readily beequipped with mechanism whereby the desired intermittent operation ofthe temple is'provided. All that it is necessary to do is to attach thisself-contained latching mechanism to the temple, and make the necessaryconnections to the actuating element. lit the thread cutting mechanismis notprovided with a suitable part to cooperate with the latch, itmayreadily be supplied. If the thread cutting temple is of the typeillustrated and there is no stud on the movable thread cutting member,it is an easy matter to furnish with the self-contained latching,-mechanism a new movable thread cutting member having astud or projectionsuch as 17, wiich may readily be slipped in place in lieu of the one inuse.

This self-contained latching mechanism includes a base, a-preterred termof which is shown separately in Fig. 2. This base is shown as a plate 20adapted to fit against the temple and be secured thereto in someconvenient position. As shown, the base corresponds in genera shape tothe vertical side wall 2 ot' the temple stand and is readily securediirmly in place thereto by belts or rivets 21 passing through. holes 22in. the plate 2) and into holes drilled or tapped in the wall 52. Thisplate of the base is provided with suitable mountings tor the dcteutlatch. In the construction illustrated, this requires simply two studs23 and 52:1: which are termed integrally or rigidly with the plate 20and project laterally therefrom. Boa-ring shoulders 25 are preferablyformed on the plate 20 at the base of the studs 23 and 24;. The stud.for! the iulcruiu tor a detent latch 26 such as shown in the i i llll])-sou patent referred to and which adapted to cooperate with the stud orprojection 17 or the movable cutter member. 'lfhe stud 23 forms triofulcrum for av second lover su h that shown in the f-itimpson patent, wlich lever is provided with a stud 28 cugraging the torlrcd end oi thedetent latch 26. (letter pins 29 or other suitable devices secure thetwo levers on the studs and l. The spring 18 already referred to isseated at one end in a projection 30 extending laterally irom the plate20 and is seated at this other end in the end of the lever 27. Thisspring thus mounted on the base acts to move the detent latch 26, and tomaintain it in, the latching position, whereby the cutting mechanism isrendered inoperative.

An apertured boss 31 is termed integrally with the base 20, with itsaperture 32 located. beneath the end of the lever 27. The Bowden wire 19is mounted in the aperture of this boss 31 and locked in. place by a setscrew 33 passingradially through the boss. Thus the boss presents aconnection to receive the actuation transmitter, or in this case theBowden wire, by means oi which the detent latch moved to its unlatchiugrposition to release and render the cutting); mechanism inoperative.

The present invention also provides in this self-contained structuremeans for adjusting the position of the eil'ective end of thedetentlatch relatively to its mounting on the base. This, in thespecific form illustrated, consists in forming the detent latch. leverin two parts, one provided with a bolt and nut 34: and the other with aslot 35, by means of which, after the base has been secured in place onthe ten'iplc, the effective end oil? thev detcnt latch may be adjusted.to any desired position with respect to the fulcrum .l-lthat may befound necessary to insure the accurate correlation of the detent latchwith the cooperating element, such as the stud 17, oi the cuttingmechanism.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is:

t ll

lllll Ill) 1. A self-contained latching mechanism for an intermittentthread cutting temple comprising a base, a tWo-part detent latch mountedon the base and movable thereon between latching position, Which rendersthe cutting mechanism inoperative, and unlatching position, Whichrenders the cutting mechanism operative, means mounted on the baseacting to move the detent latch to one of said positions, a connectionon the base to receive an actuation transmitter by means of which thedetent latch is moved to the other of said positions, means for securingthe base to the temple and means for adiustably securing together thetwo parts of the detent latch to adjust the effective end of the detentlatch relatively to the mounting of the latch on the base in order toinsure accurate correlation of the detent latch and cutting mechanismwhen the base is secured to the temple.

2. A self-contained latching mechanism for an intermittent threadcutting temple comprising a base, a detent latch lever pivotally mountedon the base, having its detent arm in two parts adjustablysecuredtogether and movable on its pivot between latching position, whichrenders the cutting mechanism inoperative, and unlatching position,which render the cutting mechanism operative, a spring mounted on thebase acting to movethe detent latch to latching position, a connectionon the base to receive an actuation transmitter by means of Which thedetent latch is moved to unlatching position, and means for securing thebase to the tempie stand, the said adjustment of the tWo parts of thedetent arm of the latch permit ting the adjustn'ient of the detent endrelatively to the mounting of the latch on the base in order to insureaccurate correlation of the detent latch and cutting mechanism when thebase is secured to the temple.

In testimony whereof, I have signed my name to this specification.

GEORGE H. WILLARD,

